Free and open-source DCIM software
Four open-source DCIM tools cover rack, device and cable documentation at zero licence cost: openDCIM (GPL-3.0), NetBox (Apache-2.0), RackTables (GPL-2.0) and Ralph (Apache-2.0). openDCIM goes furthest toward a full suite: capacity planning, power outage simulation and polling of supported power strips. NetBox is built API-first, with REST and GraphQL. All four run on your own server.
Side by side
Checked 9 Nov 2026| Field | openDCIM | NetBox | RackTables | Ralph |
|---|---|---|---|---|
| License | GPL-3.0 | Apache-2.0 | GPL-2.0 | Apache-2.0 |
| Deployment | On-prem | SaaS or on-prem | On-prem | On-prem |
| Assets | Yes | Yes | Yes | Yes |
| Power | Yes | — | — | — |
| Capacity planning | Yes | — | — | — |
| API | Yes | Yes | — | Yes |
| Status | Active | Active | Active | Source only |
| Source | opendcim.org | netboxlabs.com | racktables.org | github.com |
openDCIM
Free, open-source DCIM for tracking data center assets, cabinets, cabling and space, power and cooling capacity, with sensor polling, work orders, a REST API and power outage simulation. Self-hosted on a LAMP server.
Pick openDCIM when you want a classic DCIM on a LAMP server: cabinets, cabling, space and power capacity in one place, with power strips from APC, Geist, Liebert and Server Technology read straight into it.
NetBox
Open-source network source of truth with a full DCIM data model (sites, racks, devices, cables, power distribution) and REST and GraphQL APIs. Documentation only, not monitoring; NetBox Labs sells Cloud and Enterprise editions.
Pick NetBox when DCIM data has to drive automation. Its REST and GraphQL APIs make it the source of truth that provisioning scripts read from. NetBox Labs also sells hosted Cloud and Enterprise editions, priced on request (pricing page).
RackTables
Free, open-source tool for documenting rack space, hardware assets and IP addresses. Self-hosted.
Pick RackTables for a lightweight register of rack space, hardware and IP addresses.
Ralph
Allegro's open-source asset management, DCIM and CMDB system with data center visualization. Since February 2025 published as source only, without maintenance guarantees.
Ralph combines asset management, DCIM and a CMDB. It ships as source only since February 2025, so plan to support it yourself.
When a paid DCIM pays for itself
The open-source tools document your estate. Alarms, live dashboards and 3D floor views are where commercial products earn their price. The two suites with public prices start at $19.50 per cabinet per month (Sunbird dcTrack) and $3 per asset per year (Hyperview). Monitoring alone starts at $5.50 per node per month with Sunbird Power IQ. Keep NetBox or openDCIM as the record and add a monitoring product beside it. Compare monitoring products.